3 WLAN Mode
3.6 Modulation Analysis Measurement
Marker X
Set the X Axis value of the selected marker in the current X Axis Scale unit. If the
marker mode is off, the SCPI command has no affect other than to cause the marker
to become selected.
NOTE
The X label and value can change if the marker is moved to a trace with a
different domain.
If the marker mode is Normal, the Marker X position is absolute.
If the mode is Delta, then the X position is relative to the reference marker.
The valid X positions are the actual data points in the trace; the marker cannot be
located between points. If a SCPI command attempts to place the marker between
two points, the X value snaps to the closest point.
Note that for Vector or Constellation format, the X axis is perpendicular to the
screen (because the screen axes are used to show the real and imaginary parts of
the Y value), so adjusting the X value in this case only causes the marker to move
horizontally if the real Y value changes.
Remote
Command
:CALCulate:EVM:MARKer[1]|2|…|12:X <real>
:CALCulate:EVM:MARKer[1]|2|…|12:X?
Example
:CALC:EVM:MARK:X 0.325
:CALC:EVM:MARK:X?
Notes Marker X does not go outside the bounds of the data. If you attempt to set it to a value outside the
bounds, it is clipped at the closest limit and error -222 Data Out of Range is generated
If suffix is sent, it must match the X units for the trace the marker is on. Otherwise, error -138, "Suffix
not allowed" is generated
If you try to read or set the position of a Delta marker, remember that the position is in relative units
Couplings See "Coupling of Delta and Reference markers " on page 960
Preset None until marker is turned on
State Saved Saved in instrument state
Min Depends on trace data
Max Depends on trace data
Marker X Position (Remote Command Only)
Via SCPI, the marker position can also be set or queried in trace points. In this case,
the position setting or reading is absolute regardless of control mode.
959 WLAN Mode User's &Programmer's Reference
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